1. When we sat down，Anne __________(pour) each of us a cup of coffee.
2. The boy has some difficulty in walking because of his __________(swell) feet.
3. I'm very grateful to Lily，because she often _________(aid) me with my grammar.
4. Students should be encouraged to take part in a wide __________(vary) of afterschool activities.
5. Because of the severe __________(injure) to her knees，Li Mei had to drop out of the match.
6. No crops can grow well on the land，which has been completely __________(poison) by chemicals.
